TM9-4120-398-14
TABLE 4-2. UNIT TROUBLESHOOTING-Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
10.
CONDENSER FAN INOPERATIVE.
Step 1. Check for loose impeller.
Tighten setscrews. (See paragraph 4-36.)
Step 2. Check for defective mode selector switch (51).
Replace switch. (See paragraph 4-25.)
Step 3. Check for defective control relay (K4-K5).
Replace relay. (See paragraph 4-28.)
Step 4. Check for defective motor starter (K2.
Replace starter. (See paragraph 4-28.)
Step 5. Check for defective condenser fan motor (B2).
Repair or replace motor. (See paragraph 4-37.)
If problem still exists, refer to supervisor.
11.
COMPRESSOR RUNS CONTINUOUSLY.
Step 1. Check for defective thermostat (S2).
Replace thermostat. (See paragraph 4-26.)
Step 2. Check for defective motor starter (K3.
Replace motor starter. (See paragraph 4-28.)
Step 3. Check sight glass for bubbles or discoloration.
Shut down air conditioner and contact supervisor.
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